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LINQ is too slow to be of use when modifying lists/arrays, and for loop is not applicable to both, nor is it the fastest either. Watch this demo and learn how to modify contents of an array and a list uniformly, and still with running time that is way below other methods.
In this demo, we will measure performance of iterating through an array and through a list, using common for loop, a LINQ expression, and a span. The rest of the demo is dedicated to measuring performance of operations that mutate content of an array or a list.
Each experiment is followed by a benchmark and explanation of the results gathered by running the benchmark. Eventually, spans will be a clean winner in all respects: execution speed, minimum memory footprint, random access to memory locations, universal support for arrays and lists.
And there will be more! You will learn the dangers that hide behind using a span created from a list, and how to avoid making a bug.
Chapters:
00:00 Intro
00:46 Improving iteration performance
04:02 Improving performance of modifying a list
06:14 Using a span for fast list modification
09:27 Analysis and comment on performance data
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